| ANCA | Adirondack North Country Association 
| Others |
| ANCA | Allied Naval Communications Agency
| Others |
| ANCA | Ambient Noise Controled Amplifier
| Others |
| ANCA | Anniston Chemical Activity
| Others |
| ANCA | Antarctic Names Committee of Australia
| Others |
| ANCA | Anti neutrophil cytoplasmic antibodies
| Others |
| ANCA | Anti Neutrophil Cytoplasmic antibody
| Others |
| ANCA | Anti Neutrophil Cytoplasmic Autoantibody
| Others |
| ANCA | Anti Neutrophilic Cytoplasmic Antibodies
| Others |
| ANCA | Anti Neutrophilic Cytoplasmic Antibody
| Others |
| ANCA | Anti-Neutrophil Cytoplasmic Antibodies
| Others |
| ANCA | Anti-Neutrophil Cytoplasmic Antibody
| Others |
| ANCA | Antibody To Neutrophil Cytoplasmic Antigens
| Others |
| ANCA | antineutrophil cytoplasmic antibodies
| Others |
| ANCA | antineutrophil cytoplasmic antibody
| Others |
| ANCA | antineutrophil cytoplasmic autoantibodies
| Others |
| ANCA | Armenian National Committee of America
| Others |
| ANCA | Army Nurse Corps Association
| Others |
| ANCA | Asociacion Nacional de Comerciantes en Automoviles
| Others |
| ANCA | Association Nationale des Camionneurs Artisans
| Others |
| ANCA | Association of Nature Center Administrators
| Others |
| ANCA | Australian National Capital Artists
| Others |
| ANCA | Australian National Choral Association
| Others |
| ANCA | Australian Nature Conservation Agency
| Others |